This quiz works best with JavaScript enabled. Home > Class 6 > Class 6 Science Chapter 15 Air Around Us – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 6 Science Chapter 15 Air Around Us Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The layers of the atmosphere in order from bottom to top are A) Troposphere, stratosphere, mesosphere, thermosphere, exosphere. B) Troposphere, mesosphere, atmosphere, thermosphere. C) Mesosphere, thermosphere, troposphere, stratosphere, exosphere. D) Thermosphere, stratosphere, mesosphere, troposphere, exosphere. Show Answer Correct Answer: A) Troposphere, stratosphere, mesosphere, thermosphere, exosphere. 2. Which of these do plants need in order to make food? A) Argon. B) Carbon dioxide. C) Nitrogen. D) Oxygen. Show Answer Correct Answer: B) Carbon dioxide. 3. What is the percentage of nitrogen and oxygen in air? A) 98 %. B) 99 %. C) 97 %. D) 100 %. Show Answer Correct Answer: B) 99 %. 4. What percentage of carbon dioxide is there in air? A) 0.92%. B) 21%. C) 0.03%-0.09%. D) 0.5%-10%. Show Answer Correct Answer: C) 0.03%-0.09%. 5. What is the layer of air that surround Earth known as? A) Respiration. B) Atmosphere. C) Altitude. D) None of the above. Show Answer Correct Answer: B) Atmosphere. 6. What is wind? A) Moving air. B) Stopped air. C) Hot moving air. D) None of the above. Show Answer Correct Answer: A) Moving air. 7. Composition of Air? Page 92 thanujao A) Krypton. B) Nitrogen, Oxygen, Argon, Carbon Dioxide, Neon. C) Helium. D) Hydrogen. Show Answer Correct Answer: B) Nitrogen, Oxygen, Argon, Carbon Dioxide, Neon. 8. Air in motion is called wind A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. The precentage of which gas found in air is incorrect? A) Oxygen 21%. B) Nitrogen 87%. C) Noble gases 0.95%. D) Carbon dioxide 0.03 %. Show Answer Correct Answer: B) Nitrogen 87%. 10. What are the tiny mouths that lets the exchange in gasses A) Mouth. B) Nose. C) Hydrilla. D) Stomata. Show Answer Correct Answer: D) Stomata. 11. The presence of water vapor is Air is important for A) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 12. Air helps in the dispersal of seeds and pollen of flowers of several plants. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Which of the following process need oxygen? A) Respiration. B) Oxidation. C) Combustion. D) All of above. Show Answer Correct Answer: D) All of above. 14. Burning of fuel produces ..... A) Rain. B) Smoke. C) Fresh Air. D) All of the above. Show Answer Correct Answer: B) Smoke. 15. ..... is the process by which oxygen reacts with a fuel and releases heat energy A) Respiration. B) Oxygen cycle. C) None of these. D) Combustion. Show Answer Correct Answer: D) Combustion. 16. The layer of the atmosphere containing the ionosphere and auroras is A) Troposphere. B) Mesosphere. C) Stratosphere. D) Thermosphere. Show Answer Correct Answer: D) Thermosphere. 17. Why do mountaineers carry oxygen cylinders with them, while climbing high mountains? A) As we move up air becomes denser. B) At higher altitude air is dangerous. C) At higher altitude air is rarer. D) None of the above. Show Answer Correct Answer: C) At higher altitude air is rarer. 18. Earth is surrounded by an envelope of gases called the ..... A) Hydrosphere. B) Solar system. C) Atmosphere. D) Cloud bubble. Show Answer Correct Answer: C) Atmosphere. 19. HOW MUCH PERCENT OF OXYGEN IS IN THE AIR? A) 78%. B) 21%. C) 0.03%. D) 0.97%. Show Answer Correct Answer: B) 21%. 20. Windmills are also used to run flour mills. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. What is not true of Air?(a) It is odorless and colorless(b) It occupier space and has weight(c) it can be compressed and stored(d) None of these A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 22. ..... is a mixture of many Gases. A) Air. B) Plant. C) Atmosphere. D) None of the above. Show Answer Correct Answer: A) Air. 23. Which of these is a quality of air? A) Air takes up space. B) Air has a fixed shape. C) We can see air. D) None of the above. Show Answer Correct Answer: A) Air takes up space. 24. True Or FalseA policeman, controlling the traffic wears a mask to prevent the dust particles from entering his respiratory system through breathing. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. Which of these causes air pollution? A) Throwing litter here and there. B) Smoke from factories. C) Both of these. D) None of these. Show Answer Correct Answer: B) Smoke from factories. ← PreviousNext →Related QuizzesClass 6 Science Chapter 15 Air Around Us Quiz 1Class 6 Science Chapter 15 Air Around Us Quiz 2Class 6 Science Chapter 15 Air Around Us Quiz 3Class 6 Science Chapter 15 Air Around Us Quiz 4Class 6 Science Chapter 15 Air Around Us Quiz 5Class 6 Science Chapter 15 Air Around Us Quiz 6Class 6 Science Chapter 15 Air Around Us Quiz 7Class 6 Science Chapter 15 Air Around Us Quiz 8Class 6 Science Chapter 15 Air Around Us Quiz 9Class 6 Science Chapter 15 Air Around Us Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books